View Full Version : 1985 Chev 4x4 dualy 1 ton

10-09-2013, 02:32 PM
So bought the truck at end of August. Pics here:


So heater was disconnected and propane heater hoses re routed so it would warm up better. I ran hose from by left of thermostat to back of propane heater and then from heater to rad. It was icing up cauise owner before had to many tees in wrong directions. Runs really nice. Starts really good.

Clutch slave and master cylinder siezed but working now after some re ans reing and tlc. I can at least drive it now.

Front output flange on np205 is either loose or bearing shot. I`ll fix it over winter.

Rear driveshaft is two piece. Previous owner miss-placed rear section. I need to find a rear section 44+ inches long including a 16 spline slip yoke to go on before steady bearing. Anyone have a spare like this. I could make one with all the old ds I have lying around too but stock piece be nice.

Where the two wires come off plug to clutch\neutral safety switch, I disconnected plug and bridged terminals with a temporary jumper wire cause I was thinking clutch\neutral safety switch was faulty cause starter would not kick in. I tried a known good 454 starter I had, wiring at starter, battery, etc., and still no starter engaging. I think I finally found problem. There is a problem up in the wiring harness cause after determining wires to clutch\neutral safety switch... both wires have no power to them with key on. Then to my surprise I had pulled slightly pulled downwards on the two wires where they hang down out of wiring under dash (hard to see) and with key in start position at same time it started up!! Now it starts good however it did stall suddenly a couple times and I pulled slightly down on the wires again and it started right up. Any ideas? I'm thinking dismantle dash and trace all wires.

I may have miss-understood engine rebuilder guy in town yesterday but I'm sure he said that if 454 on propane if built properly would have pistons with a bump to up comp. ratio to run on propane. He said comp would be 180-200 psi possibly. I'm thinking just leave this 454 on propane and build up the 2nd 454 that I have to rub on gas. Looks like first step is too measure block and crank and then have block, crank, and heads checked for cracks...

10-09-2013, 02:36 PM
85chevy told me:

Its worth $2500 in parts so pretty fair price that SM465 and NP205 should be 32 spline round adapter 205 which was only found in 1 ton trucks if its original

Yah np205 has front round 4 bolt flange just like my np208's! Its sloppy and previous owner drove it around his yard with just front diff cause rear ds rear section he miss-placed. I think its tight on shaft and bearings just shot... good wintewr project to rebuild in warm shop lol

10-09-2013, 02:38 PM
And rear output of np205 is a u-joint set-up, so slip yoke is only between rear diff yoke and steady bearing... sound like all stock? I'll take a pic of what is missing...

10-10-2013, 10:15 AM
Fixed toyota t case. Shifter shaft was stuck. Cleaned it and working fine now. Put grill on today and check all fluids and then go hunting! Maybe next photo with an animal too!!

http://i65.photobucket.com/albums/h213/godtool/IMG_1054600x800.jpg (http://s65.photobucket.com/user/godtool/media/IMG_1054600x800.jpg.html)

So heres the 85 Chev and where 2nd piece of rear driveshaft is missing....

http://i65.photobucket.com/albums/h213/godtool/IMG_1028800x600.jpg (http://s65.photobucket.com/user/godtool/media/IMG_1028800x600.jpg.html)

http://i65.photobucket.com/albums/h213/godtool/IMG_1056600x800.jpg (http://s65.photobucket.com/user/godtool/media/IMG_1056600x800.jpg.html)

Its 16 tooth, 1.5 inches dia., 44-51 inches long, rear u-joint with caps on would be approx. 3-916 inches across.